Born on July 15, 1981, in Lancaster, Pennsylvania, this American actor is best known for his role as Lieutenant Kelly Severide on the NBC series "Chicago Fire." He studied business management at West Virginia University before pursuing acting. He gained early recognition in "The Vampire Diaries" and appeared in films like "Zero Dark Thirty" and "The Other Woman." His compelling performances have made him a staple in both television and film, earning him a dedicated fan base.